Bushing for feed-water pipes for boilers.



E L. STORY.

BUSHING FOR FEED WATER PIPES FOR BOILERS.

APPLICATION FILED MAY 29. 1915.

1,174,297. Patented Mar. 7, 1916.

Fig. l

Inventor:

Edward L .S1'ory, 5y %6MZW&W

Atfys EDWARD 1.. STORY, or EVERETT, MASSACHUSETTS.

BUSHING FOR FEED-WAT R PIPES roR'BoI nRs. I

Specification of Letters Patent.

. Pateintedllllar. 7,1916.

Application filed May 29, 1915. Serial No. 31,268.

To all whom it may concern:

'Be it known that I, EDWARD L. STORY, a citizen of the United States, residing at Everett, county of Middlesex, State of Massachusetts, have invented an Improvement in Bushings for Feed-WVater Pipes for Boilers, of which the following description,

in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts. In some boilers of the fire-tube variety it is the practice to connect the feed water pipe which leads to the boiler from the exterior thereof to a bushing that is secured in the boiler head and which projects through the latter into the boiler and then to screw-thread to the inner end of the bushing a distributing pipe which leads to the back end of the boiler and through which the water is delivered to thevboiler.

It is found in practice that the distributing pipe is apt to break ofi atthe screwthreaded part thereof and drop down upon the fire tubes of the boiler. When this happens it is necessary to repair the damage by first removing from the inner end of the bushing the end of the distributing pipe which is retained therein and then to screw the broken end of the distributing pipe into the bushing again. This operation is a laborious one due to the fact that the re-' moval of the end of the distributing pipe from the bushing can usually be done'only by chipping the end of the pipe out and also to the fact that there is very little room within the boiler in which a person may .work.

now be described, after which the novel features will be pointed out in the appended claims.

In the drawings Figure 1 is a sectional view showing one form of my invention; Fig. 2 is a similar View showing another embodiment of the invention; Fig. 3 is a reduced section on the 'line 3'3, Fig. 1.

1 indicates a'boiler head into which the fire fiues (not shown) of the-boiler are secured as usual. relates merely to the bushing to which the feed water pipe and distributing pipe are c0nnected,-I have not deemed it necessary to illustrate the boiler, but have contented myself with showing a'po'rtion of the boiler" head 11. j

2 indicates the feed water pipe which is on the exterior of the boiler and through which the feed water is delivered to the boiler, and 3 indicates a portion of the distributing pipe within the boiler which communicates with the feed water pipe 2 and through which the water is delivered to the rear end of the boiler, as usual in boilers of this type. As stated above, the common practice at present is to screw the'feed water pipe 2 into a bushing secured in the boiler head 1 andwhich projects into the interior of the. boiler and then to screw the'end of the pipe- 3 into'the inner end of the bushing. This construction has the disadvantages which are set forth above.

In my present invention I provide a novel form ofbushing with which the feed water pipe 2 has'communication and which is so constructed that the end of the distributing pipe 3-can be slippedinto the inner end of the bushing and'held thereinby a clamp so that the distributing pipe maybe readily re- Inasmuch as the invention a moved from thebushingorinserted in place with .a minimum expenditure of time and labor. In the construction shown in Fig. 1

'- my improvedbushing is shownat 41 and it is screw-threaded into the boiler head 1, as shown at 5, the screw-threads on the bushing preferably being tapered so as to make a tight joint. 6 is a lock nut employed to assist in holding the bushing firmly in the boiler head 1. The bushing extends through the boiler head 1 and has the portion 7 on the exterior of the boiler head into which the feed water pipe 2 is screwed as usual. The bushing 4 is made of considerable length and projects several inches into the boiler, as shown inFig. 1, the inner end 9 of the bushing being split at 8, as shown by dotted lines Fig. 1. This split inner end 9 is of sufiicient size so as to permit the end of the distributing pipe 3 to be readily inserted thereinto. Said bushing is constructed to present a smooth bore so that the attachment of the distributing pipe thereto is made by merely slippingthe-pipe into the bushing instead of screw-threading it thereto. The distributing pipe is firmly held in position by means of a clamping ring 10, which is shown as a split clamping ring encircling the split portion 9 of the bushing and clamped tightly thereabout by means of a clamping bolt 11. It is not essential that there should be an absolutely water-tight joint between the distributing pipe 3 and the bushing 9, and the connection shown in Fig. 1 makes a suficiently tight joint for all practical purposes. Moreover, by using the construction shown the walls of the distributing pipe 3 are not reduced in thickness as they would be if threads were cut therein and, therefore, the liability of the distributing pipe being weakened by corrosion is greatly re duced. Moreover, if the distributing pipe should break off near the bushing 4- and it should become necessary to remove the broken end of the pipe, this can be readily done by' loosening the clamping ring 1'0 and then removing the broken pipe end. The end of the pipe 3 may then be inserted into the split end of the bushing and clamped in place, thus repairing the damage, and all this can be accomplished in a short time and with very little labor. The splitting of the end 9 of the bushing enables it to contract slightly, thus providing for firmly clamping it about the pipe 3.

In Fig. 2 I have shown an embodiment of my invention which is especially designed to be used in connection with boilers which are already equipped with the old construction above set forth. In this embodiment the feed Water pipe 2 is screwed into a bushing 12 which is screwed into the boiler head 1 from the exterior, said bushing 12 being that into which the distributing pipe 3 is usually screwed. In applying my invention to this construction without discarding the bushing 12 I employ a bushing member 13,

one end 14 of which is screwed into the innerend of the bushing 12' and the other end 15 of which issplit, as shown at 16, and is provided with a smooth bore of a size to receive the distributing pipe 3. Said pipe 3 is clamped in the split portion 15 of the bushing 13 by means of a clamping ring 10. In equipping a boiler with my invention, as shown in Fig. 2, the distributing pipe 3 will be unscrewed from the bushing 12, the bushing member 13 will be screwed into the bushing 12 and the pipe 3 then secured to the bushing member 13, as shown. In this embodiment the connection by which the distributing pipe 3 is secured to the boiler head 1 is in the form of a two-part bushing comprising the two sections 12 and 13, the latter being constructed to have the end of the distributing pipe 3 clamped therein.

lVhile I have illustrated some selected embodiments of my invention, I do not wish to be limited to the constructional features shown.

I claim:

1. In a device of the class described, the combination with a boiler head, of a bushing secured thereto and having its inner end extending into the boiler, a distributing pipe removably clamped to said inner end, and a feed water pipe connected to the exterior end of the bushing to deliver water therethrough to the distributing pipe.

' 2. In a device of the class described, the combination with a boiler head, of a bushing secured thereto and having its inner end eX tending into the boiler, said inner end being split, a distributing pipe having its end slipped into the split end of the bushing, means for clamping said split end of the bushing to said distributing pipe, and a feed water pipe connected to the exterior end of the bushing to deliver water therethrough to the distributing pipe. 7

In testimony whereof I have name to this specification.

EDWARD L. STORY.

signed my Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

